videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Beethoven: Violin Sonata No. 9 (Movt. II, part 2), Beethoven: Violin Sonata No. 9 (Movt. II, part 1), Beethoven: Violin Sonata No. 9 (Movt. III)